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Naturwissenschaften

Title:		Behavioural evidence of male volatile pheromones in the sex-role reversed wolf spiders Allocosa brasiliensis and Allocosa alticeps
Author(s):		Aisenberg A; Baruffaldi L; Gonzalez M;
Address:		"Laboratorio de Etologia, Ecologia y Evolucion, Instituto de Investigaciones Biologicas Clemente Estable, Av. Italia 3318, CP 11600, Montevideo, Uruguay. aisenber@iibce.edu.uy"
Journal Title:		Naturwissenschaften
Year:		2010
Volume:		20091002
Issue:		1
Page Number:		63 - 70
DOI:		10.1007/s00114-009-0612-z
ISSN/ISBN:		1432-1904 (Electronic) 0028-1042 (Linking)
Abstract:		"The use of chemical signals in a sexual context is widespread in the animal kingdom. Most studies in spiders report the use of female pheromones that attract potential sexual partners. Allocosa brasiliensis and Allocosa alticeps are two burrowing wolf spiders that show sex-role reversal. Females locate male burrows and initiate courtship before males perform any detectable visual or vibratory signal. So, females of these species would be detecting chemical or mechanical cues left by males. Our objective was to explore the potential for male pheromones to play a role in mate detection in A. brasiliensis and A. alticeps. We designed two experiments. In Experiment 1, we tested the occurrence of male contact pheromones by evaluating female courtship when exposed to empty burrows constructed by males or females (control). In Experiment 2, we tested the existence of male volatile pheromones by evaluating female behaviour when exposed to artificial burrows connected to tubes containing males, females or empty tubes (control). Our results suggest the occurrence of male volatile pheromones that trigger female courtship in both Allocosa species. The sex-role reversal postulated for these wolf spiders could be driving the consequent reversal in typical pheromone-emitter and detector roles expected for spiders"
Keywords:		"Animal Communication Animals Behavior, Animal/physiology Body Size *Disorders of Sex Development Ecosystem Female *Gender Identity Housing, Animal Male Pheromones/*physiology Reproduction/physiology Sex Characteristics Sexual Behavior, Animal/physiology S;"
Notes:		"MedlineAisenberg, Anita Baruffaldi, Luciana Gonzalez, Macarena eng Research Support, Non-U.S. Gov't Germany 2009/10/03 Naturwissenschaften. 2010 Jan; 97(1):63-70. doi: 10.1007/s00114-009-0612-z. Epub 2009 Oct 2"